问题遇到的现象和发生背景
接口中已经使用了@Param 将传入的参数命名，两个参数，
UserMapper接口代码如下：
//修改密码
int updatePassword(@Param("id") int id,
@Param("userPassword") String password);
UserMapper.xml中代码如下：
<!--修改密码1-->
<update id="updatePassword" parameterType="String">
update smbms_user set userPassword=#{userPassword} where id=#{id}
</update>
<!--修改密码2-->
<update id="updatePassword" parameterType="String">
update smbms_user
<set>
userPassword=#{userPassword} where id=#{id}
</set>
</update>
问题相关代码，请勿粘贴截图
测试类中的代码：
@Test
public void testUpdatePassword(){
SqlSession sqlSession = MybatisUtil.getSqlSession();
UserMapper mapper = sqlSession.getMapper(UserMapper.class);
int row = mapper.updatePassword(1, "admin123");
System.out.println(row);
sqlSession.close();
}
运行结果及报错内容
1.运行测试类，使用UserMapper.xml中进行，报错，原因可能是：参数有两个，而我设置的parameterType=String,导致不对
报错信息：
org.apache.ibatis.exceptions.PersistenceException:
### Error updating database. Cause: org.apache.ibatis.type.TypeException: Could not set parameters for mapping: ParameterMapping{property='id', mode=IN, javaType=class java.lang.String, jdbcType=null, numericScale=null, resultMapId='null', jdbcTypeName='null', expression='null'}. Cause: org.apache.ibatis.type.TypeException: Error setting non null for parameter #2 with JdbcType null . Try setting a different JdbcType for this parameter or a different configuration property. Cause: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String
### The error may exist in com/wang/dao/UserMapper.xml
### The error may involve com.wang.dao.UserMapper.updatePassword-Inline
### The error occurred while setting parameters
### SQL: update smbms_user set userPassword=? where id=?
### Cause: org.apache.ibatis.type.TypeException: Could not set parameters for mapping: ParameterMapping{property='id', mode=IN, javaType=class java.lang.String, jdbcType=null, numericScale=null, resultMapId='null', jdbcTypeName='null', expression='null'}. Cause: org.apache.ibatis.type.TypeException: Error setting non null for parameter #2 with JdbcType null . Try setting a different JdbcType for this parameter or a different configuration property. Cause: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String
at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)
at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:199)
at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:67)
at org.apache.ibatis.binding.MapperProxy$PlainMethodInvoker.invoke(MapperProxy.java:144)
at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:85)
at com.sun.proxy.$Proxy4.updatePassword(Unknown Source)
at TestUserMapper.testUpdatePassword(TestUserMapper.java:32)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)
Caused by: org.apache.ibatis.type.TypeException: Could not set parameters for mapping: ParameterMapping{property='id', mode=IN, javaType=class java.lang.String, jdbcType=null, numericScale=null, resultMapId='null', jdbcTypeName='null', expression='null'}. Cause: org.apache.ibatis.type.TypeException: Error setting non null for parameter #2 with JdbcType null . Try setting a different JdbcType for this parameter or a different configuration property. Cause: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String
at org.apache.ibatis.scripting.defaults.DefaultParameterHandler.setParameters(DefaultParameterHandler.java:89)
at org.apache.ibatis.executor.statement.PreparedStatementHandler.parameterize(PreparedStatementHandler.java:94)
at org.apache.ibatis.executor.statement.RoutingStatementHandler.parameterize(RoutingStatementHandler.java:64)
at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:88)
at org.apache.ibatis.executor.SimpleExecutor.doUpdate(SimpleExecutor.java:49)
at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:117)
at org.apache.ibatis.executor.CachingExecutor.update(CachingExecutor.java:76)
at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:197)
... 27 more
Caused by: org.apache.ibatis.type.TypeException: Error setting non null for parameter #2 with JdbcType null . Try setting a different JdbcType for this parameter or a different configuration property. Cause: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String
at org.apache.ibatis.type.BaseTypeHandler.setParameter(BaseTypeHandler.java:71)
at org.apache.ibatis.scripting.defaults.DefaultParameterHandler.setParameters(DefaultParameterHandler.java:87)
... 34 more
Caused by: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String
at org.apache.ibatis.type.StringTypeHandler.setNonNullParameter(StringTypeHandler.java:26)
at org.apache.ibatis.type.BaseTypeHandler.setParameter(BaseTypeHandler.java:69)
... 35 more
Process finished with exit code -1
2.运行测试类，使用UserMapper.xml中进行，不报错，想知道原因，为啥用就不报错？同样也是传入了两个参数为啥就行？
我想要达到的结果
问：update多个参数 使用了@Param 之后，不用设置parameterType,可以运行成功。但是第二种使用了 **set标签 **的,设置parameterType=String,但我有两个参数，一个String,一个int,可以执行成功,为啥？我只设置了一个参数的parameterType,讲道理是执行不成功的，求解释！（是不是使用就不走parameterType了？）
